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Open

Apple Crash Report crashes when opening Firefox; but, before generating a FireFox Crash Report.

Frank

Process: crashreporter [1930] Path: /Applications/Firefox.app/Contents/MacOS/crashreporter.app/Contents/MacOS/crashreporter Identifier: org.mozilla.crashreporter Version: 1.0 Code Type: ARM-64 (Native) Role: Unspecified Parent Process: firefox [1875] Coalition: org.mozilla.firefox [1424] Responsible Process: firefox [1875] User ID: 501

Date/Time: 2026-10-15 16:40:02.8902 -0700 Launch Time: 2026-10-15 16:40:02.8144 -0700 Hardware Model: Mac15,14 OS Version: macOS 27.0.1 (26A434) Release Type: User

Crash Reporter Key: 99AF36FD-ABB0-6C7F-D431-8CB88902FCCB Incident Identifier: 8FFD7652-AEB8-449A-83CE-3DFCC27F451A

Time Awake Since Boot: 1500 seconds

System Integrity Protection: enabled

Triggered by Thread: 0 main, Dispatch Queue: com.apple.main-thread

Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000

Termination Reason: Namespace SIGNAL, Code 6, Abort trap: 6 Terminating Process: crashreporter [1930]


Application Specific Information: abort() called


Thread 0 Crashed:: main Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x187d99650 __pthread_kill + 8 1 libsystem_pthread.dylib 0x187dd597c pthread_kill + 296 2 libsystem_c.dylib 0x187cd8458 abort + 148 3 crashreporter 0x102339bf4 0x1020f8000 + 2366452 4 crashreporter 0x10233ab1c std::process::abort::hd520a7101c5fdc83 + 12 5 crashreporter 0x102339930 _RNvCs1Y7DaGC1cwg_7___rustc12___rust_abort + 12 6 crashreporter 0x102147b5c _RNvCs1Y7DaGC1cwg_7___rustc18___rust_start_panic + 12 7 crashreporter 0x1023398ec _RNvCs1Y7DaGC1cwg_7___rustc10rust_panic + 16 8 crashreporter 0x1022f2804 std::panicking::panic_with_hook::h657ee82e431041f8 + 648 9 crashreporter 0x1022f245c 0x1020f8000 + 2073692 10 crashreporter 0x1022ee700 std::sys::backtrace::__rust_end_short_backtrace::hbd8bf96e4ee54567 + 12 11 crashreporter 0x1022dd578 _RNvCs1Y7DaGC1cwg_7___rustc17rust_begin_unwind + 32 12 crashreporter 0x10233e8a0 core::panicking::panic_fmt::ha09fb24313daf262 + 40 13 crashreporter 0x10233e62c core::result::unwrap_failed::hfd1628134417d023 + 72 14 crashreporter 0x102119788 0x1020f8000 + 137096 15 crashreporter 0x10212b620 0x1020f8000 + 210464 16 crashreporter 0x10212b5c0 0x1020f8000 + 210368 17 crashreporter 0x1022e6ce0 std::rt::lang_start_internal::h11fc0900699d88c7 + 952 18 crashreporter 0x102147af4 main + 52 19 dyld 0x1879ffe80 start + 6688


Thread 0 crashed with ARM Thread State (64-bit):

   x0: 0x0000000000000000   x1: 0x0000000000000000   x2: 0x0000000000000000   x3: 0x0000000000000000
   x4: 0xffffffff94e393c5   x5: 0x0000000000000005   x6: 0x000000000000000a   x7: 0x000000010240c02f
   x8: 0x752b168d8df13b34   x9: 0x752b168c607ec4b4  x10: 0x0000000000000002  x11: 0x00000000fffffffd
  x12: 0x0000000000000000  x13: 0x0000000000000000  x14: 0x0000000000000000  x15: 0x0000000000000000
  x16: 0x0000000000000148  x17: 0x00000001ef53b518  x18: 0x0000000000000000  x19: 0x0000000000000006
  x20: 0x0000000000000103  x21: 0x00000001ed900060  x22: 0x000000010244f7d0  x23: 0x0000000102459000
  x24: 0x0000000000000002  x25: 0x0000000102b3f120  x26: 0x0000000102b3f0f0  x27: 0x0000000000000041
  x28: 0x0000000000000001   fp: 0x000000016dd06040   lr: 0x0000000187dd597c
   sp: 0x000000016dd06020   pc: 0x0000000187d99650 cpsr: 0x40001000
  far: 0x0000000000000000  esr: 0x56000080 (Syscall)

Binary Images:

      0x1020f8000 -        0x10242ffff org.mozilla.crashreporter (*) <cef71e23-29da-3457-b74a-2f85b7be4a0d> /Applications/Firefox.app/Contents/MacOS/crashreporter.app/Contents/MacOS/crashreporter
      0x187d90000 -        0x187dce9ab libsystem_kernel.dylib (*) <f63bf418-8f75-34a4-aaf1-8caf2b9b6a05> /usr/lib/system/libsystem_kernel.dylib
      0x187dcf000 -        0x187ddb91b libsystem_pthread.dylib (*) <5a1828c3-cbc2-3b85-bd07-c8ed10021a41> /usr/lib/system/libsystem_pthread.dylib
      0x187c5d000 -        0x187cdfca3 libsystem_c.dylib (*) <fba7b23e-aa60-3a90-9aa4-a7a2e0ad63ee> /usr/lib/system/libsystem_c.dylib
      0x1879ce000 -        0x187a8d6e3 dyld (*) <d341ddcb-7969-3a9c-8e03-0cf4751398a9> /usr/lib/dyld
              0x0 - 0xffffffffffffffff ??? (*) <00000000-0000-0000-0000-000000000000> ???

External Modification Summary:

 Calls made by other processes targeting this process:
   task_for_pid: 0
   thread_create: 0
   thread_set_state: 0
 Calls made by this process:
   task_for_pid: 0
   thread_create: 0
   thread_set_state: 0
 Calls made by all processes on this machine:
   task_for_pid: 0
   thread_create: 0
   thread_set_state: 0

VM Region Summary: ReadOnly portion of Libraries: Total=1.9G resident=0K(0%) swapped_out_or_unallocated=1.9G(100%) Writable regions: Total=90.2M written=336K(0%) resident=336K(0%) swapped_out=0K(0%) unallocated=89.9M(100%)

                               VIRTUAL   REGION 

REGION TYPE SIZE COUNT (non-coalesced)

===== ======= =

Deferred Reclaim 64.0M 1 Guard 385.0G 1 Malloc 17.8M 9 Malloc Guard Page 3280K 4 OS Alloc Once 32K 1 Stack 8160K 1 Stack Guard 56.0M 1 Untagged 32K 2 Untagged (reserved) 128K 1 reserved VM address space (unallocated) __AUTH 1988K 218 __AUTH_CONST 33.8M 396 __CTF 824 1 __DATA 6992K 403 __DATA_CONST 23.8M 394 __DATA_DIRTY 2141K 349 __FONT_DATA 2352 1 __LINKEDIT 1.6G 2 __OBJC_RO 118.0M 1 __OBJC_RW 2735K 1 __TEXT 380.0M 468 __TPRO_CONST 132K 4 page table in kernel 336K 1 shared memory 32K 1

===== ======= =

TOTAL 387.3G 2261 TOTAL, minus reserved VM space 387.3G 2261



Full Report


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 "version" : 2,
 "userID" : 501,
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 "coalitionID" : 1424,
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   "build" : "26A434",
   "releaseType" : "User"
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 "captureTime" : "2026-10-15 16:40:02.8902 -0700",
 "codeSigningMonitor" : 2,
 "incident" : "8FFD7652-AEB8-449A-83CE-3DFCC27F451A",
 "pid" : 1930,
 "translated" : false,
 "cpuType" : "ARM-64",
 "procLaunch" : "2026-10-15 16:40:02.8144 -0700",
 "procStartAbsTime" : 37390919841,
 "procExitAbsTime" : 37391091016,
 "procName" : "crashreporter",
 "procPath" : "\/Applications\/Firefox.app\/Contents\/MacOS\/crashreporter.app\/Contents\/MacOS\/crashreporter",
 "bundleInfo" : {"CFBundleVersion":"1.0","CFBundleIdentifier":"org.mozilla.crashreporter"},
 "storeInfo" : {"deviceIdentifierForVendor":"D51C22ED-FC6C-5A85-9304-5E841E88696C","thirdParty":true},
 "parentProc" : "firefox",
 "parentPid" : 1875,
 "coalitionName" : "org.mozilla.firefox",
 "crashReporterKey" : "99AF36FD-ABB0-6C7F-D431-8CB88902FCCB",
 "chargingStatus" : {"externalSourceConnected":true},
 "developerMode" : 1,
 "responsiblePid" : 1875,
 "responsibleProc" : "firefox",
 "codeSigningID" : "org.mozilla.crashreporter",
 "codeSigningTeamID" : "43AQ936H96",
 "codeSigningFlags" : 570503953,
 "codeSigningValidationCategory" : 6,
 "codeSigningTrustLevel" : 4294967295,
 "codeSigningAuxiliaryInfo" : 0,
 "instructionByteStream" : {"beforePC":"fyMD1f17v6n9AwCR69\/\/l78DAJH9e8Go\/w9f1sADX9YQKYDSARAA1A==","atPC":"AwEAVH8jA9X9e7+p\/QMAkeDf\/5e\/AwCR\/XvBqP8PX9bAA1\/WcAqA0g=="},
 "bootSessionUUID" : "700EE97D-4AFC-492B-BDB1-06C60185AA51",
 "sip" : "enabled",
 "exception" : {"codes":"0x0000000000000000, 0x0000000000000000","rawCodes":[0,0],"type":"EXC_CRASH","signal":"SIGABRT"},
 "termination" : {"flags":0,"code":6,"namespace":"SIGNAL","indicator":"Abort trap: 6","byProc":"crashreporter","byPid":1930},
 "asi" : {"libsystem_c.dylib":["abort() called"]},
 "extMods" : {"caller":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"system":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"targeted":{"thread_create":0,"thread_set_state":0,"task_for_pid":0},"warnings":0},
 "faultingThread" : 0,
 "threads" : [{"threadState":{"x":[{"value":0},{"value":0},{"value":0},{"value":0},{"value":18446744071912526789},{"value":5},{"value":10},{"value":4332765231,"symbolLocation":2384,"symbol":"core::unicode::unicode_data::white_space::WHITESPACE_MAP::h11810b4fc23607a2"},{"value":8442866723663723316},{"value":8442866718606279860},{"value":2},{"value":4294967293},{"value":0},{"value":0},{"value":0},{"value":0},{"value":328},{"value":8310207768},{"value":0},{"value":6},{"value":259},{"value":8280604768,"symbolLocation":224,"symbol":"_main_thread"},{"value":4333041616,"symbolLocation":5632,"symbol":"tracing_core::dispatcher::NONE::hae57235903aea87d"},{"value":4333080576,"symbolLocation":4864,"symbol":"crossbeam_utils::atomic::atomic_cell::lock::LOCKS::h6579e1d385d79fea"},{"value":2},{"value":4340314400},{"value":4340314352},{"value":65},{"value":1}],"flavor":"ARM_THREAD_STATE64","lr":{"value":6574397820},"cpsr":{"value":1073745920},"fp":{"value":6137339968},"sp":{"value":6137339936},"esr":{"value":1442840704,"description":"(Syscall)"},"pc":{"value":6574151248,"matchesCrashFrame":1},"far":{"value":0}},"id":35687,"triggered":true,"name":"main","queue":"com.apple.main-thread","frames":[{"imageOffset":38480,"symbol":"__pthread_kill","symbolLocation":8,"imageIndex":1},{"imageOffset":27004,"symbol":"pthread_kill","symbolLocation":296,"imageIndex":2},{"imageOffset":504920,"symbol":"abort","symbolLocation":148,"imageIndex":3},{"imageOffset":2366452,"imageIndex":0},{"imageOffset":2370332,"symbol":"std::process::abort::hd520a7101c5fdc83","symbolLocation":12,"imageIndex":0},{"imageOffset":2365744,"symbol":"_RNvCs1Y7DaGC1cwg_7___rustc12___rust_abort","symbolLocation":12,"imageIndex":0},{"imageOffset":326492,"symbol":"_RNvCs1Y7DaGC1cwg_7___rustc18___rust_start_panic","symbolLocation":12,"imageIndex":0},{"imageOffset":2365676,"symbol":"_RNvCs1Y7DaGC1cwg_7___rustc10rust_panic","symbolLocation":16,"imageIndex":0},{"imageOffset":2074628,"symbol":"std::panicking::panic_with_hook::h657ee82e431041f8","symbolLocation":648,"imageIndex":0},{"imageOffset":2073692,"imageIndex":0},{"imageOffset":2057984,"symbol":"std::sys::backtrace::__rust_end_short_backtrace::hbd8bf96e4ee54567","symbolLocation":12,"imageIndex":0},{"imageOffset":1987960,"symbol":"_RNvCs1Y7DaGC1cwg_7___rustc17rust_begin_unwind","symbolLocation":32,"imageIndex":0},{"imageOffset":2386080,"symbol":"core::panicking::panic_fmt::ha09fb24313daf262","symbolLocation":40,"imageIndex":0},{"imageOffset":2385452,"symbol":"core::result::unwrap_failed::hfd1628134417d023","symbolLocation":72,"imageIndex":0},{"imageOffset":137096,"imageIndex":0},{"imageOffset":210464,"imageIndex":0},{"imageOffset":210368,"imageIndex":0},{"imageOffset":2026720,"symbol":"std::rt::lang_start_internal::h11fc0900699d88c7","symbolLocation":952,"imageIndex":0},{"imageOffset":326388,"symbol":"main","symbolLocation":52,"imageIndex":0},{"imageOffset":204416,"symbol":"start","symbolLocation":6688,"imageIndex":4}]}],
 "usedImages" : [
 {
   "source" : "P",
   "arch" : "arm64",
   "base" : 4329537536,
   "CFBundleIdentifier" : "org.mozilla.crashreporter",
   "size" : 3375104,
   "uuid" : "cef71e23-29da-3457-b74a-2f85b7be4a0d",
   "path" : "\/Applications\/Firefox.app\/Contents\/MacOS\/crashreporter.app\/Contents\/MacOS\/crashreporter",
   "name" : "crashreporter",
   "CFBundleVersion" : "1.0"
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 {
   "source" : "P",
   "arch" : "arm64e",
   "base" : 6574112768,
   "size" : 256428,
   "uuid" : "f63bf418-8f75-34a4-aaf1-8caf2b9b6a05",
   "path" : "\/usr\/lib\/system\/libsystem_kernel.dylib",
   "name" : "libsystem_kernel.dylib"
 },
 {
   "source" : "P",
   "arch" : "arm64e",
   "base" : 6574370816,
   "size" : 51484,
   "uuid" : "5a1828c3-cbc2-3b85-bd07-c8ed10021a41",
   "path" : "\/usr\/lib\/system\/libsystem_pthread.dylib",
   "name" : "libsystem_pthread.dylib"
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   "name" : "libsystem_c.dylib"
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   "source" : "P",
   "arch" : "arm64e",
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   "size" : 784100,
   "uuid" : "d341ddcb-7969-3a9c-8e03-0cf4751398a9",
   "path" : "\/usr\/lib\/dyld",
   "name" : "dyld"
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 {
   "size" : 0,
   "source" : "A",
   "base" : 0,
   "uuid" : "00000000-0000-0000-0000-000000000000"
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],

 "sharedCache" : {
 "base" : 6565429248,
 "size" : 7410368512,
 "uuid" : "c284a291-b68b-3d0d-a1a0-3f866f87efdc"

},

 "vmSummary" : "ReadOnly portion of Libraries: Total=1.9G resident=0K(0%) swapped_out_or_unallocated=1.9G(100%)\nWritable regions: Total=90.2M written=336K(0%) resident=336K(0%) swapped_out=0K(0%) unallocated=89.9M(100%)\n\n                                VIRTUAL   REGION \nREGION TYPE                        SIZE    COUNT (non-coalesced) \n===========                     =======  ======= \nDeferred Reclaim                  64.0M        1 \nGuard                            385.0G        1 \nMalloc                            17.8M        9 \nMalloc Guard Page                 3280K        4 \nOS Alloc Once                       32K        1 \nStack                             8160K        1 \nStack Guard                       56.0M        1 \nUntagged                            32K        2 \nUntagged (reserved)                128K        1         reserved VM address space (unallocated)\n__AUTH                            1988K      218 \n__AUTH_CONST                      33.8M      396 \n__CTF                               824        1 \n__DATA                            6992K      403 \n__DATA_CONST                      23.8M      394 \n__DATA_DIRTY                      2141K      349 \n__FONT_DATA                        2352        1 \n__LINKEDIT                         1.6G        2 \n__OBJC_RO                        118.0M        1 \n__OBJC_RW                         2735K        1 \n__TEXT                           380.0M      468 \n__TPRO_CONST                       132K        4 \npage table in kernel               336K        1 \nshared memory                       32K        1 \n===========                     =======  ======= \nTOTAL                            387.3G     2261 \nTOTAL, minus reserved VM space   387.3G     2261 \n",
 "legacyInfo" : {
 "threadTriggered" : {
   "name" : "main",
   "queue" : "com.apple.main-thread"
 }

},

 "logWritingSignature" : "8d1ec80450aa430ceb7c82a8dcf5ada3221a774f",
 "bug_type" : "309",
 "roots_installed" : 0,
 "trmStatus" : 8192,
 "trialInfo" : {
 "rollouts" : [
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     "factorPackIds" : [
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     "deploymentId" : 240000008
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     "factorPackIds" : [
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     "deploymentId" : 240000006
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} }

Model: Mac15,14, BootROM 20457.1.29, proc 28:0:20:8 processors, 96 GB, SMC Graphics: Apple M3 Ultra, Apple M3 Ultra, Built-In Display: Studio Display, 5120 x 2880 Retina, Main, MirrorOff, Online Display: Acer S201HL, 900 x 1600, MirrorOff, Online Display: VX1935wm-3, 1440 x 900 (Widescreen eXtended Graphics Array Plus), MirrorOff, Online Memory Module: LPDDR5, Hynix AirPort: spairport_wireless_card_type_wifi (0x14E4, 0x4388), wl0: Jul 2 2026 01:06:10 version 23.10.1039.0.41.51.239 FWID 01-40b8d11f IO80211_driverkit-1585.80 "IO80211_driverkit-1585.80" Sep 18 2026 22:02:52 Bluetooth: Version (null), 0 services, 0 devices, 0 incoming serial ports Network Service: Ethernet, Ethernet, en0 Thunderbolt Bus: Mac Studio, Apple Inc. Thunderbolt Bus: Mac Studio, Apple Inc. Thunderbolt Bus: Mac Studio, Apple Inc. Thunderbolt Bus: Mac Studio, Apple Inc. Thunderbolt Bus: Mac Studio, Apple Inc. Thunderbolt Bus: Mac Studio, Apple Inc. Thunderbolt Device: Studio Display, Apple, 1, 66.15

Process: crashreporter [1930] Path: /Applications/Firefox.app/Contents/MacOS/crashreporter.app/Contents/MacOS/crashreporter Identifier: org.mozilla.crashreporter Version: 1.0 Code Type: ARM-64 (Native) Role: Unspecified Parent Process: firefox [1875] Coalition: org.mozilla.firefox [1424] Responsible Process: firefox [1875] User ID: 501 Date/Time: 2026-10-15 16:40:02.8902 -0700 Launch Time: 2026-10-15 16:40:02.8144 -0700 Hardware Model: Mac15,14 OS Version: macOS 27.0.1 (26A434) Release Type: User Crash Reporter Key: 99AF36FD-ABB0-6C7F-D431-8CB88902FCCB Incident Identifier: 8FFD7652-AEB8-449A-83CE-3DFCC27F451A Time Awake Since Boot: 1500 seconds System Integrity Protection: enabled Triggered by Thread: 0 main, Dispatch Queue: com.apple.main-thread Exception Type: EXC_CRASH (SIGABRT) Exception Codes: 0x0000000000000000, 0x0000000000000000 Termination Reason: Namespace SIGNAL, Code 6, Abort trap: 6 Terminating Process: crashreporter [1930] Application Specific Information: abort() called Thread 0 Crashed:: main Dispatch queue: com.apple.main-thread 0 libsystem_kernel.dylib 0x187d99650 __pthread_kill + 8 1 libsystem_pthread.dylib 0x187dd597c pthread_kill + 296 2 libsystem_c.dylib 0x187cd8458 abort + 148 3 crashreporter 0x102339bf4 0x1020f8000 + 2366452 4 crashreporter 0x10233ab1c std::process::abort::hd520a7101c5fdc83 + 12 5 crashreporter 0x102339930 _RNvCs1Y7DaGC1cwg_7___rustc12___rust_abort + 12 6 crashreporter 0x102147b5c _RNvCs1Y7DaGC1cwg_7___rustc18___rust_start_panic + 12 7 crashreporter 0x1023398ec _RNvCs1Y7DaGC1cwg_7___rustc10rust_panic + 16 8 crashreporter 0x1022f2804 std::panicking::panic_with_hook::h657ee82e431041f8 + 648 9 crashreporter 0x1022f245c 0x1020f8000 + 2073692 10 crashreporter 0x1022ee700 std::sys::backtrace::__rust_end_short_backtrace::hbd8bf96e4ee54567 + 12 11 crashreporter 0x1022dd578 _RNvCs1Y7DaGC1cwg_7___rustc17rust_begin_unwind + 32 12 crashreporter 0x10233e8a0 core::panicking::panic_fmt::ha09fb24313daf262 + 40 13 crashreporter 0x10233e62c core::result::unwrap_failed::hfd1628134417d023 + 72 14 crashreporter 0x102119788 0x1020f8000 + 137096 15 crashreporter 0x10212b620 0x1020f8000 + 210464 16 crashreporter 0x10212b5c0 0x1020f8000 + 210368 17 crashreporter 0x1022e6ce0 std::rt::lang_start_internal::h11fc0900699d88c7 + 952 18 crashreporter 0x102147af4 main + 52 19 dyld 0x1879ffe80 start + 6688 Thread 0 crashed with ARM Thread State (64-bit): x0: 0x0000000000000000 x1: 0x0000000000000000 x2: 0x0000000000000000 x3: 0x0000000000000000 x4: 0xffffffff94e393c5 x5: 0x0000000000000005 x6: 0x000000000000000a x7: 0x000000010240c02f x8: 0x752b168d8df13b34 x9: 0x752b168c607ec4b4 x10: 0x0000000000000002 x11: 0x00000000fffffffd x12: 0x0000000000000000 x13: 0x0000000000000000 x14: 0x0000000000000000 x15: 0x0000000000000000 x16: 0x0000000000000148 x17: 0x00000001ef53b518 x18: 0x0000000000000000 x19: 0x0000000000000006 x20: 0x0000000000000103 x21: 0x00000001ed900060 x22: 0x000000010244f7d0 x23: 0x0000000102459000 x24: 0x0000000000000002 x25: 0x0000000102b3f120 x26: 0x0000000102b3f0f0 x27: 0x0000000000000041 x28: 0x0000000000000001 fp: 0x000000016dd06040 lr: 0x0000000187dd597c sp: 0x000000016dd06020 pc: 0x0000000187d99650 cpsr: 0x40001000 far: 0x0000000000000000 esr: 0x56000080 (Syscall) Binary Images: 0x1020f8000 - 0x10242ffff org.mozilla.crashreporter (*) <cef71e23-29da-3457-b74a-2f85b7be4a0d> /Applications/Firefox.app/Contents/MacOS/crashreporter.app/Contents/MacOS/crashreporter 0x187d90000 - 0x187dce9ab libsystem_kernel.dylib (*) <f63bf418-8f75-34a4-aaf1-8caf2b9b6a05> /usr/lib/system/libsystem_kernel.dylib 0x187dcf000 - 0x187ddb91b libsystem_pthread.dylib (*) <5a1828c3-cbc2-3b85-bd07-c8ed10021a41> /usr/lib/system/libsystem_pthread.dylib 0x187c5d000 - 0x187cdfca3 libsystem_c.dylib (*) <fba7b23e-aa60-3a90-9aa4-a7a2e0ad63ee> /usr/lib/system/libsystem_c.dylib 0x1879ce000 - 0x187a8d6e3 dyld (*) <d341ddcb-7969-3a9c-8e03-0cf4751398a9> /usr/lib/dyld 0x0 - 0xffffffffffffffff ??? (*) <00000000-0000-0000-0000-000000000000> ??? 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All Replies (13)

Can you download a full installer from firefox.com and just replace your current application bundle with this fresh one?

If nothing changes, can you try holding Shift when launching the browser to see if that would help start into a Troubleshoot Mode at least?

Firefox Crassh Reporter still crashes on startup; though not as soon after. Shift startup does not enter Trouble Shoot Mode and crashes as well (about the same delay).

Modified by Frank

sorry about the unintended insert.

"Shit"->"Shift"

Can you try downloading the separate Firefox Nightly nightly.mozilla.org that will come with its own clean profile to start using factory defaults, to see if you can launch that one at least?

Hello, Built Nightly, ./mach run resulted in the following: Creating the 'common' site at /Users/franksG4/.mozbuild/srcdirs/firefox-a0e26a2a4341/_virtualenvs/common

0:01.80 Overriding application data directory to /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/tmp/AppData/Roaming
0:01.80 Overriding local application data directory to /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/tmp/Local
0:01.80 /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/firefox -foreground -profile /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/tmp/profile-default

sandbox_extension_issue_file_to_process failed for /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/plugin-container.app: 1 (Operation not permitted) 2026-10-19 04:00:48.803 Nightly GPU Helper[37752:184747] Failure on line 688 in function id scheduleApplicationNotification(LSNotificationCode, NSWorkspaceNotificationCenter *): noErr == _LSModifyNotification(notificationID, 1, &code, 0, NULL, NULL, NULL) 2026-10-19 04:00:51.134 Nightly GPU Helper[37752:184747] Error received in message reply handler: Connection invalid 2026-10-19 04:00:51.134 Nightly GPU Helper[37752:184759] Connection Invalid error for service com.apple.hiservices-xpcservice. bootstrap_check_in(): (os/kern) unknown error code (44c) sandbox_extension_issue_file_to_process failed for /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/plugin-container.app: 1 (Operation not permitted) sandbox_extension_issue_file_to_process failed for /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/plugin-container.app: 1 (Operation not permitted) sandbox_extension_issue_file_to_process failed for /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/plugin-container.app: 1 (Operation not permitted) Error in cpuinfo: sysctlbyname("hw.packages") failed: Operation not permitted Error in cpuinfo: sysctlbyname("hw.cacheconfig") failed: Operation not permitted sandbox_extension_issue_file_to_process failed for /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/plugin-container.app: 1 (Operation not permitted) UNSUPPORTED (log once): POSSIBLE ISSUE: unit 1 GLD_TEXTURE_INDEX_2D is unloadable and bound to sampler type (Float) - using zero texture because texture unloadable sandbox_extension_issue_file_to_process failed for /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/plugin-container.app: 1 (Operation not permitted) sandbox_extension_issue_file_to_process failed for /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/plugin-container.app: 1 (Operation not permitted) sandbox_extension_issue_file_to_process failed for /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/plugin-container.app: 1 (Operation not permitted) sandbox_extension_issue_file_to_process failed for /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/plugin-container.app: 1 (Operation not permitted) sandbox_extension_issue_file_to_process failed for /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/plugin-container.app: 1 (Operation not permitted) sandbox_extension_issue_file_to_process failed for /Volumes/exPrime/Projects/Programs/Objective-C/FireFox/firefox/obj-aarch64-apple-darwin27.0.0/dist/Nightly.app/Contents/MacOS/plugin-container.app: 1 (Operation not permitted). No crash occurred from this build.

Indicates that two problems may exist in 158.0.1 namely: Something caused a Crash Report and the Crash Report has an issue. If I could create an Xcode project with the crashing build to call the crash report, I could get the address of the cause for the Crash Report by putting a breakpoint at the Crash Report Entry and the examine the Crash Report itself. Kill two birds with one stone.

Hope this helps. Frank

Hi,

The people who answer questions here, for the most part, are other users volunteering their time (like me), not Mozilla employees or developers. When a Mozilla employee jumps into a discussion, you'll see the Mozilla Staff label next to their name.

This seems to be a bug (or it could be apple being dumb as they do that alot especially with macOS 27), and as a volunteer that doesn't know how to really code, this it out of my reach.

You can file a bug report or feature request. See File a bug report or feature request for Mozilla products for details.

Modified by ItsWempo

I'm not really sure where the question turned into a build env issue as none of the question history implied you're trying to build your own binaries from source. For help with that I'd defer to wiki.mozilla.org/Matrix with rooms like #developers or #introduction to help iron out any local mach env wrinkles.

As for mysterious crashes, make sure you're not running unsupported configuration as disabled SIP integrity protections and the like: bugzilla.mozilla.org/2070811

Not really a build issue as far as Firefox goes regarding a normal sandbox build following the recommendation that I try the daily Night which requires a build. Did that and I got a successful build which gave an indication of what called for a crash report while continuing to run in an orderly manner (same as the releases after crashing in the Crash Report). Downside is that the build’s sandbox (debug arena) also failed (not sure whether it [sandbox] is Mozilla or Xcode). I have debug capability using Xcode; however, I need to create a Xcode project using an existing build’s source. Could not find a means of creating a Xcode project through a provided make (gmake for ARM64 Mac’s) and cmake to build the project. Once that is done, I can debug the problem.

I followed the recommendation of filing a bug report via Bugzilla only to have the twofold issue (issue calling for a crash report and the crash report itself) refilled as a Crash Report issue.

The crash that caused the Crash Report call appears to be from attempting “Operation[s] not permitted” at startup [Firefox] and the Crash Report crash is from a loop that eventually tries to read protected memory (could also be the sandbox problem).

Nightly is available from nightly.mozilla.org as a signed and notarized official download, no need to build anything, just press the "Download" button. (Or help yourself to any channel, platform, language in firefox.com/download/all …)

Start with this: Firefox Nightly is an unstable testing and development version of Firefox that shows new features before they reach the normal release. The key word is "unstable".

The local build creates an app specifically built for the destination system to be put into a quarantined structure (sandbox) so as to not corrupt the system when analyzing. Turns out the custom build corrupted the sandbox when ran.

Here is the issue in a nutshell: 1. The Initial Fault: Firefox starts up and attempts a prohibited low-level system call (likely compiling metal textures, accessing ~/Library/Application Support, or initializing IPC shared memory). macOS 27 blocks this immediately with an Operation not permitted signal. 2. The Crash Reporter Loop: Firefox intercepts this crash signal and spawns its sub-binary, firefox-bin or crashreporter.app. 3. The Sandbox Crash: Because the crash reporter also inherits the exact same sandboxing and TCC constraints from the environment, it crashes instantly while trying to generate its dump file or access the network. 4. The "Zombie" Resurrection: Because the crash reporter crashed out-of-order (Nightly did not crash), it fails to send the termination (SIGKILL) instruction back to the main thread. The main process simply moves to the next instruction block and proceeds to paint a blank canvas or generic window, completely unaware it technically "died" seconds prior.

From the initial post, the educational guess in the MTL (Firefox) vs MTL4 (MasOS 27.*) of my system. Not previously mentioned is the excessive number of warnings that appeared during compilation (something a strait download would not show), then build; however, the local build did exhibit the same issue as previously described when ran.

The original issue began with the 153. official release, occurred in the 158. official release, and subsequently in the 160. Nightly build release.

To look at those warnings and testing at startup (take a step farther back), I need a full fledge IDE (Xcode) to examine those warnings (compilation has limited detection for identifying actual faults) in the source code while going though a build (without having run it), then possibly running with breakpoints once possible fault locations are identified.

If you have a version in mind you can run mozilla.github.io/mozregression to help bisect which builds do launch and where it no longer succeeds — to help inform what changeset is the culprit for your system, and potentially find any rationale in the linked timelines — if you consistently get "good" and "bad" builds on both sides of the regression range.

System: Apple Studio: M3 Ultra running macOS 27.0.1 excluding Rosetta to run Intel. The installed Integrated Development Environment (IDE) is Xcode 27.0; thus, any build configuration requires ARM64 native, MTL4, and macOS 27.0.1 framework as a baseline. The Nightly Firefox provides latest Firefox source code for custom builds; thus, should be configurable to the aforementioned (come with the recommended IDE: Xcode 26 or newer). Built Firefox Nightly (160) specifically configured for macOS 27.0.1 using ./mach build (specified Terminal command) to run in Apple sandbox via ./mach run. I should be able to use the provided IDE tools to debug; however, the attempted run corrupted the sandbox as described in my previous post.

Noticed during the build phase, excessive warnings and RUST crashes (not a good sign); yet, that history does not appear to be saved anywhere.

Doubtful if any previous .dmg will be properly configured for the system. Especially since the Nightly build is specifically configurable; thus, the best source though still crashes as previously described. The only downside is that I have yet to figure out how to view the intermediary compiled files with the provided IDE. Would like a gmake file that does not call the executable mach to create a direct build command structure rather than an executable, a cmake to actually build using the created command structure (required for creating a build target), and a cmake to create a Xcode .proj file (no need to save the intermediate since since Xcode allows a build without run to obtain the needed intermediate files).

As stated earlier, the initial crash appears to be the MTL vs MTL4 which configures the CPU/GPU memory sharing structure.

Sual ver

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